Missing git tags for v0.17.0 and v0.18.0 releases

The git tags for v0.17.0 and v0.18.0 releases are missing, which causes the `-version` flag to display v0.16.0 instead of the actual version.
```
containerd-stargz-grpc -version
containerd-stargz-grpc v0.16.1-360-g469e3af3 469e3af3c51fb38ab69f80c658978d71fdd6bef8
```